Construction of tubes from single strips of metal.



No. 682,713. Patented S ept. l7, I901. T. A. JUDGE.

CONSTRUCTION OF TUBES FROM SINGLE STRIPS 0F METAL.

(Application filed July 18, 1901.) (No Model.)

Fig. l

Fi -4- Fi -5.

Wjiirwtm'm V UNITED STATES PATENT. OFFICE.

THOMAS ALFRED JUDGE, OF SHEFFIELD, ENGLAND.

CONSTRUCTION (IF TUBES FROM SINGLE STRIPS OF METAL.

SLEEGIFICATION formingpart of Letters Patent No. 682,713, datedSeptember 17, 1901.

" Application filed July 18,

To (ZZZ whom it may concern:

Be it known that LTHOMAS ALFRED JUDGE,

a subject of the King of Great Britain, residing in the city ofSheflield, county of York, England, have invented new and usefulImprovements in the Construction of Tubes and Cylinders from a SingleStrip of Metal, of which the following is a specification.

My invention relates to tubes, cylinders, or drums constructed from asingle continuous strip of metal, such as steel, which shall be of onediameter from end to end, without ribs, rivets, or other interferenceswith the periphcry, and in which the edges of the strip are supportedand united throughout the entire length of the coil.

In the annexed drawings, Figure 1 is a view of a cylinder, showing thejunction of the coils. Fig. 2 is an end view of same. Fig. 3 representsthe inside face of the corrugated and set-down or-stepped strip, on anenlarged scale; and Fig. 4, an end view of same.

In the manufacture of a cylinder according to lnyinvention I takea stripof thin n1etalsay, for example, steel-of the desired length and width,and I first set it down or form a step A upon it by means of rolls. Ithen pass it through either a pair of prepared rolls or a press toproduce upon the narrow stepped or set-down edge B a series of taperingindentations 0, their projecting convex parts being upon the under sideor that part which will be inside the coil. The strip so prepared is1901. SerialNo. 68,821. (NomodeL) now passed through a combinedcoiling-ma chine and bath of molten solder, by means which the edge ofthe flat part D is coiled upon the set-down part B, abutting against thestep A, as indicated in Fig. 4, and the molten solder being admitted tothe interior of the first coils as they leave the coiling-machine thejunction of the overlapping coils is automatically soldered together.

I am aware that cylinders have been made prior to my invention from twoor more strips.

of metal coiled one upon the other and also from a single strip with alap-joint, also that such joints have been soldered, and I therefore donot claim cylinders, tubes, or drums constructed by such means, broadly;but

What I do claim as my invention,- and desire to secure by LettersPatent, is-

A cylinder, tube, or drum, constructed from a strip of metal set downlongitudinally on one edge to form a step, such set-down edge crimped orcorrugated with tapering grooves, then coiled with the plain edge of thestrip abutting against the said step and lying upon the set-downportion, to which it is soldered as hereinbefore described and setforth.

In witness whereof I have hereunto set my hand in presence of twowitnesses.

THOMAS ALFRED JUDGE. Witnesses:

ROBERT F. DRURY, ENSOR D. DRURY.

